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Power Usage to Improve in Linux 3

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Kernel Log: BIOS bugs behind greater power use

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| Since version 2.6.38, kernels have used more power because, in 
| certain situations, they disable the power-saving ASPM feature. New stable and 
| long-term kernels offer corrections; however, one of them is conspicuously lagging behind.
| 
| In April, the Phoronix web site reported that some systems require more power with Linux 
| 2.6.35 and 2.6.38 than they did with the previous versions. Phoronix says it has now found 
| the reason for the increased power consumption in 2.6.38.
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http://www.h-online.com/open/features/Kernel-Log-BIOS-bugs-behind-greater-power-use-1269032.html
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